Heating radiator



4 sheets-sheet 1 Aug.. 1, lW39 A. N. A. ANDERSSON HETIN G RADI ATOB Filed Dec. y28, 1936 Aug L i939. A, N. A. ANDERSSQN 2%?,822

` HEATING RADIATOR l Filed Dec. 28, 1956 4 Sheets-Sheet 2 [n Ven-for xe i' /Vo we j "ofi u@ 1, 1939., A. N. A; ANDERSSON f 2,167,822

HEATING RADIATOR vF'iled Deo. 28, 1936 4 Sheets-Sheet 3 Axe! //Qff ,4A/@wunder Andersson 3 A. N. A. ANDERssoN 2,157,822

HEATING RADIATOR 4 Sheets-Sheet 4 Filed Dec. 28, 1956 3l l ke/ /1/0/'6 ffl/@Xande/"ndersson @l M, z v de Patented Aug. l, 1939 UNI-TED STATES PATENT OFFICE HEATING RADIATOR Axel Nore Alexander Andersson,

Stockholm,

Sweden, assignor to Aktiebolaget Svenska Flaktfabriken, Stockholm, Sweden, a company of Sweden Claims.

This invention relates to radiators for heatingpurposes composed of a plurality of mutually communicating sections` enclosing between them air channels extending vertically through the radiator. It is an object of the invention to provide an improved construction of such radiators whichis'particularly adapted for simultaneously heating the air in the room andfresh air drawn from a fresh air intake through the air channels into the room.

According to the invention each radiator sectionv is formed of two lplates which are jointed together at the edges, preferably by welding, and which are provided along their edges with laterally'projecting hollow pressed iianges, adjacent sections being connected with each other by individually uniting together the plates around the edges of the openings through which the sections communicate with each other in such a manner, that through said connection the hollow flanges are held abutting against each other so as to form hollow walls separating the air channels from the room. According to a preferred embodiment of the inventionthe adjacent sections are individually united together by' welding seams extending around-the edges of the communication openings.

vOther features of the'invention' will hereinafter appear and Will be pointed out in the appended claims.

H A'I'he invention will now be described more in detail having reference to the drawings annexed to this specification and forming part thereof `whichshow by way of example two different embodiments of my invention.

In the drawings:

.Figure 1 is a front view of a heating radiator according toa first embodiment of the invention, lv Figure 2 is a plan view of the radiator shown in Figure 1.

the Aduct for connecting thev fresh air channels to the freshA air intake being removed. i Figure 9is a vertical section in the abutting surface between two adjacent radiator sections.

l:Figure 10 isa 1detail View showing on a larger scale the air-tight connection between the fresh air duct and the radiator.

Figure 11 shows on a larger scale the radiator section shown in Figure 9.

Figure l2 is a vertical section on the line I2-I 2 in Figure 11.

Figures 13 to 18 are horizontal sections on the lines I3-I3, III-I4 etc. in Figure 11.

The radiator shown in Figures 1 to 7 is composed of a plurality of vertically arranged sections I to 5 of pressed metal plate each of which sections is made of two symmetrical halves which are mutually welded together along the edges 6-Ill as is most clearly seen in Figures 4-7. At the top and at the bottom the sections are pirovided with round openings II and IZ in the side walls through which openings adjacent sections communicate at the top and at the bottom so that a common water space is` formed. Adjacent sections are connected together through welded joints alo-ng the edges I3, I4 of the openings II, I2, which welded joints form seals between the different sections and also form connections through which the sections are held together so as to form a rigid system. The mechanical joining of the sections can, if required, be further strengthened through spot welding at certain points in the abutting side walls. For simplicity of illustration the connections of the radiator to the supply and discharge water pipes are not shown in the drawings.

The upper rear part of the radiator is connected to an air inlet opening in an outer wall by means of an air duct I5. In the latter is provided a shutter I6 adjustable from the interior of the room, which shutter is disposed in the upper part of the air duct for the purpose of pre- 'venting particles which happen to drop into the air duct from entering the air channels of the radiator. In direct connection with the air duct I5 there are provided according to the invention air channels I'I in the radiator between the varii Iupwards through the front part of the radiator and out into the room.

The air channels I'I are formed by grooveshaped depressions pressed in the side walls of the sections. The plates of which the radiator sections are composed are preferably pressed so that the opposite halves of adjacent sections become symmetrical with respect to a plane through the abutting surfaces of the sections, each channel being formed of two opposite depressions in the side walls. Provided that the plates are carefully pressed and carefully connected together at the welded joints 6-I0 and I3, I4 the plane parts of the side walls of the sections will come to lie closely together so that no special sealing is re-k quired. In some cases, however, it may be desirable to apply a sealing mass between the Vabutting surfaces. The groove-shaped depressions make the side walls sufficiently rigid to permitthe portions of the side walls abutting against each other to be pressed accurately plane.

In order to secure under all conditions a perfect seal between the opposite side surfaces of the radiator sections, the middle portions of the side walls, particularly around the openings II, I2, can simultaneously with the pressing of the groove-shaped impressions or through a separate pressing operation be given a slightly bent-in shape. When the side walls are thereafter welded together at the edges of the openings II, I2 while the side walls of the plates are keptpre-ssed closely together under elastic deformation of the plates, the spring tension remaining in the side walls after welding'is completed will maintain adjacent sections pressed against each other with great force, whereby a sealing contact between the side Walls is ensured and the radiator in its entirety obtains increased stiffness.

The inlet and outlet openings of the channels are formed by the radiator sections at their upper part being given a cross sectional shape which narrows in the direction outwards as shown in Figure 5. Said sectional shape changes continuously downwards into the sectional shape shown in Figure 6.

The inlet openings are completely covered by the air duct I placed over the upper rear half of the radiator, the air duct being' preferably secured Vto the radiator by welding. Through'the outlet openings 20 positioned in the upper Vfront portion ofthe radiator the air channels'are in open connection with the air in the room` in which the radiator is installed, Theopenings '20 are 4preferably covered with a removable grille 2| serving to damp and distribute the airu current and also vto prevent foreign objects from'being thrown into the channels I'I. l

The channels I'I are contracted at the levelY of the openings I2, as shown 4at YI8 in Figure r3. Thesecontractions have for their object to cause the air which has previously been near the walls of the channel to mix with the air which flows at the'centre of the channeland therefore is colder. For the same purpose the airy channels are made shallower at said points as'shown vat, I9 in Figf ures lland '7. l j v i In some cases it may be preferableto dispose the channels II entirely above the openings I2, the latter openings being then 'lojcated asclose to the bottom of the radiator sections as possible in order to leave room for the parts of the channels which at the bottom connect the Vertical channel portions together.

In the .embodiment of the invention just described the fresh air channels are obviously so located that the side iianges forming said chanf nels render the welding together of the individual sections to a'composite radiator rather 'diicult, in that the welding must be effected from the inside of the radiator. This can be readily done, when it is a question of adding one section at a time. The construction described does not, however, permit of welding together two or more radiator parts each consisting of a plurality of sections. Yet this is sometimes desirable, for instance to be able rapidly to eifect an order for a radiator which is not of standard size by welding together two or more of the standard sized radiators kept in stock. Figures 8 to 18 illustrate an embodiment of the invention in which the fresh air channels are positioned entirely above respectively below the joints along which the adjacent sections are welded together resulting in that said joints become readily accessible for welding from without.

In the radiator shown in Figure 8 the sections 25 positioned nearest to the ends are of ordinary shape so that the air in the room has free access' between the'sections. The middle sections 26, on the other hand, are formed with pressed side flanges 2`I and 28 which in adjacent sectionsabut against each other so that between the sections closed channels 29 are .formed which in the embodiment illustrated are substantially J-shaped and open lat opposite sides of the radiator. The ilanges 21 and 28 are positioned between theside openings 30, 3I through which the radiator sections communicate with each other, Aas is most clearly seen in Figure 11,'wherefore the circular welded'joints 32 and 33 become readily accessible from without. The upper mouths 34 of the channels 29 communicate over a space enclosed by a duct 35 with a fresh air intake, not shown. The lower channel AAends 36, which are positioned yat the front side of the radiator, open directly into the room. The radiator -is particularly intended to be installed in a room which is artificially ventilated through evacuation. On Aaccount of the reduction in'pressure caused inthe room on account'of Ythe sucking out of the air, fresh air is drawn'in through the channels 29, the sucked-in air being heated 'by the radiator during litspassage through 'the radiator channels.

`I claim:

'1.'A radiator unit vfor simultaneously heating the air in the locality in Awhich the radiator is situatedand Ventilating air introduced into said locality; comprising a plurality of mutually intercommunic'ating "hollow vertical radiator sections forrn'edwith hollow 'side'rlanges which are indirect communication with the interior of the jrespective 4sections and 'adapted `to abut tightly against similar side flanges onthe adjacent sections so yas to form between the sections closed channls'eac'h' comprising arear and a front vertical branch, a ventilatingair intake duct communicatinglat the rear of said unit with the {rear vertical branch of each section at itsupp'er 'end and atrits lower end communicatingwiththe vfront vertical branch, and the upper end of said front vertical branch opening directlyintothe locality to be heated'by the radiator.

2. A- radiator. -unit according to claim 1, in which the closed channels between the sections are extended -downwardly at the rear vof and thence upwardly at the front of the sections to form substan-tially U-,shaped passage-ways l:for effectively prolonging the V contact of thevfventilating air withthe heat radiating portions of 'the unit.

3. A 'radiato unit'aco'r'dmgto ciaimigm which the closed channels'between the sections are extended downwardly at 'the rear of and thenceupwardly at the front ofthe sections`A to form substantially #shaped .passageways `for efiss fectively'prolonging the contact ofthe ventilatim ing air with the heat radiating portions of the unit, the longer branches of the channels being connected to the Ventilating air intake.

4. A radiator unit according to claim l, in which the passage-Ways for the Ventilating air end in the front and rear portions of the radiator.

5. A radiator unit according to claim 1, in which the air channels extend entirely above the lower communication openings for the heating medium. 

